Convert VoIP call activity into a monthly data-transfer estimate. Enter the average concurrent call count, on-the-wire bitrate per call, active talk hours, and operating days. The result can help assess metered WAN links, mobile failover plans, or branch data allowances. A direction multiplier lets you report one network direction or the combined upload-and-download transfer volume.
The estimate is decimal gigabytes transferred by voice media under a steady average concurrency assumption.
Call signaling, recordings sent elsewhere, software updates, and other application traffic are outside the media estimate unless included in the entered rate.
With 25 average calls at 90 kbps, 8 hours per day, 22 days, counting both directions, estimated transfer is 356.4 GB per month.
Data volume accumulates over time, so average active concurrency is more representative. Peak calls are more appropriate for bandwidth capacity.
Enter the bitrate for one direction and use the multiplier to count one direction or combined upload and download.
Only the live media stream is included. Recording storage or later uploads should be estimated separately.
It may lower average traffic when enabled, but the effect depends on speech activity and implementation. Use measured on-the-wire rate when possible.
Router counters may include signaling, retransmissions, tunneling, non-voice traffic, and different unit conventions.
| Factor | Purpose |
|---|---|
| Average calls | Time-weighted simultaneous media sessions |
| On-the-wire kbps | Codec and packet headers per direction |
| Talk schedule | Hours and days over which media flows |
| Direction multiplier | One-way or combined transfer volume |